Receivers / Flats / Uppers

Receivers / Flats / Uppers

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  • Qty in Cart
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  • HKP MP5 Replacement Buffer for Folding Stock or End Cap HKP MP5 Replacement Buffer for Folding Stock or End Cap

    HKP MP5 Replacement Buffer for Folding Stock or End Cap

    HKP HK Parts

    $3.49
    HKP MP5 Replacement Buffer for Folding Stock or End Cap Spare Replacement Buffer For Choate Folding Stocks Or End caps. Compatible With: Choate MP5 and MP5K stocks or end caps
    HKP-18735
    $3.49
    Qty in Cart: 0
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    $3.49
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  • Choate MP5 & HK94 End Cap & Sling Swivel Choate MP5 & HK94 End Cap & Sling Swivel

    Choate MP5 & HK94 End Cap & Sling Swivel

    Choate

    $36.95
    Choate MP5 & HK94 End Cap and Sling Swivel 100% US-made MP5 and HK94 end cap features an extra thick heavy-duty rubber buffer that is replaceable with a simple screwdriver. Each HK end cap also features a sling swivel for use with all types of slings...
    HKP-00115
    $36.95
    Qty in Cart: 0
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    $36.95
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  • Out Of Stock
    B&T MP5, MP5K - Low Profile Scope Mount B&T MP5, MP5K - Low Profile Scope Mount

    B&T MP5, MP5K - Low Profile Scope Mount

    B&T Brugger & Thomet

    $119.95
    B&T MP5, MP5K - Low Profile Scope Mount B&T low profile scope mount for the HK MP5, SP5 & MP5K, SP5K Color: Black Height max: 30.7 mm Length max: 84 mm Length of top rail: 84 mm Material: Aluminum NATO Accessory Rails: 1 Part number:...
    HKP-16875
    $119.95
    Qty in Cart: 0
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    $119.95
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  • Semi Auto Shelf For Receiver - Billeted

    Semi Auto Shelf For Receiver - Billeted

    $19.95
    Semi Auto Shelf For Receiver - Billeted HK Semi Auto Shelf milled from one solid billet to HK's factory specifications (no castings here). This is the needed receiver shelf that is welded to the receiver to allow the use of the clipped & pinned...
    HKP-01521
    $19.95
    Qty in Cart: 0
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    $19.95
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  • PTR HK 91/G3 (7.62x51 / .308) Receiver Flat PTR HK 91/G3 (7.62x51 / .308) Receiver Flat

    PTR HK 91/G3 (7.62x51 / .308) Receiver Flat

    PTR

    $99.95
    HK G3, 91, PTR & CETME Flat - PTR Made by PTR with original HK tooling using factory specifications and a properly stamped receiver. No FFL is required as this is an unfolded flat that ships directly to the customer. This US made receiver flat...
    HKP-02320
    $99.95
    Qty in Cart: 0
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    $99.95
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  • Out Of Stock
    B&T MP5, MP5K Low Profile Mount, Extended T1/T2 B&T MP5, MP5K Low Profile Mount, Extended T1/T2

    B&T MP5, MP5K Low Profile Mount, Extended T1/T2

    B&T Brugger & Thomet

    $159.95
    B&T MP5, MP5K Low Profile Mount, Extended T1/T2 Works with Aimpoint T1/H1 & T/1/T2 style red dots such as the Vortex Viper, etc. Specifications: Color: Black Height max: 23.5 mm Length max: 138 mm Length of top rail: 138 mm Material:...
    HKP-16876
    $159.95
    Qty in Cart: 0
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    $159.95
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  • HKP HK MP5 .22 Sling Clip Kit - Black HKP HK MP5 .22 Sling Clip Kit - Black

    HKP HK MP5 .22 Sling Clip Kit - Black

    HKP HK Parts

    $24.95
    HK, Walther, Umarex MP5 .22 Sling Clip Kit. Each unit will fit all models of the MP5 .22 that have the 3 mounting holes on the left side of the magwell. This item installs in a few mins and comes complete with all you need for the install. With the...
    HKP-15706
    $24.95
    Qty in Cart: 0
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    $24.95
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  • PTR HK 91/G3/51 (7.62x51 / .308) Flat With Weldment Set PTR HK 91/G3/51 (7.62x51 / .308) Flat With Weldment Set

    PTR HK 91/G3/51 (7.62x51 / .308) Flat With Weldment Set

    PTR

    $166.95
    HK91, G3, PTR, CETME Flat & Weldment Combo - PTR Made by PTR91 on original HK tooling using factory specifications and a properly stamped receiver ready to roll and build. No FFL is required as this is an unfolded flat.  Compatible With: HK G3...
    HKP-02086
    $166.95
    Qty in Cart: 0
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    $166.95
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  • Out Of Stock
    B&T MP5, MP5K Low Mount For T1/H1 & T2 Aimpoint B&T MP5, MP5K Low Mount For T1/H1 & T2 Aimpoint

    B&T MP5, MP5K Low Mount For T1/H1 & T2 Aimpoint

    B&T Brugger & Thomet

    $99.95
    B&T MP5, MP5K Low Mount For T1/H1 & T2 Aimpoint Fits all HK MP5, MP5K variants. Ideal for use with the Aimpoint line of T-1/T2 & H-1/H2 type of optics. This mount is the lowest low profile mount available for use with the T1/T2 style of...
    HKP-16862
    $99.95
    Qty in Cart: 0
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    $99.95
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  • HKP HK UMP/USC (.40 S&W/.45 ACP/9mm) Enhanced Top Receiver Rail HKP HK UMP/USC (.40 S&W/.45 ACP/9mm) Enhanced Top Receiver Rail

    HKP HK UMP/USC (.40 S&W/.45 ACP/9mm) Enhanced Top Receiver Rail

    HKP HK Parts

    $49.95
    HK USC, UMP Top Receiver Rail With Hardware. The Extended Length Allows The Use Of All Optics That Fit On A Picatinny Rail. This unit has a contoured no snag design for ease of use and a beautiful fit. Made in the USA. Made from billet machined aluminum...
    HKP-14541
    $49.95
    Qty in Cart: 0
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    $49.95
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  • HKP Spare Buffer For Folding Stocks & End Caps HKP Spare Buffer For Folding Stocks & End Caps

    HKP Spare Buffer For Folding Stocks & End Caps

    HKP HK Parts

    $9.95
    HKP Spare Buffer For Folding Stocks & End Caps New US manufactured flat style "H"buffer to replace the factory HK buffer on MP5K folding stocks and end caps. As well as a spare or replacement buffer for the MP5 & MP5K folding B&T stocks. Made...
    HKP-17886
    $9.95
    Qty in Cart: 0
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    $9.95
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  • HKP Flat Bending Billeted Jig Set For All HK Style Flats HKP Flat Bending Billeted Jig Set For All HK Style Flats

    HKP Flat Bending Billeted Jig Set For All HK Style Flats

    HKP HK Parts

    $449.95
    NEW LATEST 4th GENERATION  VERSION AND DESIGN. THE FINEST JIG SET AVAILABLE! 100% USA billeted universal flat bending jig for all HK receiver flats including our new PTR .308 flats and the PTR/LSC flats. Each bending jig comes complete with all the...
    HKP-19583
    $449.95
    Qty in Cart: 0
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    $449.95
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  • Out Of Stock
    HKP Semi Auto Shelf, Hanger Block For Receiver HKP Semi Auto Shelf, Hanger Block For Receiver

    HKP Semi Auto Shelf, Hanger Block For Receiver

    HKP HK Parts

    $13.95
    HK Semi Auto Shelf Weldment, Hanger Block Weldment HK Semi Auto Shelf, Hanger Block to HK's factory specifications for c/p trigger housings. Weld on shelf that is the needed receiver block that welds to the rearward portion of the magwell to allow the...
    HKP-17572
    $13.95
    Qty in Cart: 0
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    $13.95
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  • Choate MP5 Replacement Buffer For Folding Stock Or End Cap

    Choate MP5 Replacement Buffer For Folding Stock Or End Cap

    Choate

    $3.95
    Choate MP5 Replacement Buffer For Folding Stock Or End Cap   Compatible With: Choate MP5 and MP5K stocks or end caps
    HKP-00116
    $3.95
    Qty in Cart: 0
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    $3.95
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  • HKP HK MP5 9mm Receiver Flat with Weldment Set HKP HK MP5 9mm Receiver Flat with Weldment Set

    HKP HK MP5 9mm Receiver Flat with Weldment Set

    HKP HK Parts

    $219.95
    HKP HK MP5 9mm Receiver Flat with Weldment Set New MP5 receiver flat and weldment set combined for the best complete build option on the market. Made by the original German tool and die maker of the LSC receiver flat utilizing factory original German...
    HKP-20920
    $219.95
    Qty in Cart: 0
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    $219.95
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  • Out Of Stock
    H&K Magazine Catch - MP5, MP5K - Latest Style H&K Magazine Catch - MP5, MP5K - Latest Style

    H&K Magazine Catch - MP5, MP5K - Latest Style

    H&K Heckler & Koch

    $54.95
    H&K Magazine Catch - Latest Style Genuine HK mag release for factory and clone firearms.  This component often resolves issues with mags not locking into position on HK clones and builds.  Constructed from a single piece of steel unlike the...
    HKP-00911
    $54.95
    Qty in Cart: 0
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    $54.95
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  • H&K HK MR556/MR762/416//417 Complete Piston Rod Assembly

    H&K HK MR556/MR762/416//417 Complete Piston Rod Assembly

    H&K Heckler & Koch

    $64.95
    H&K HK MR556, MR762, 416, & 417 Complete Piston Rod Assembly  A great replacement or spare to keep on hand. Compatible With: HK MR556 HK 416 HK 416 A5 MR762 HK 417 Please Note: Does not fit barrels less than 10 inches.
    HKP-00042
    $64.95
    Qty in Cart: 0
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    $64.95
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  • HKP MP5/HK94 Complete Weldment Set For Receiver Flat

    HKP MP5/HK94 Complete Weldment Set For Receiver Flat

    HKP HK Parts

    $49.95
    HKP MP5/HK94 Complete Weldment Set For Receiver Flat This is the finest, most correct weldment set for your HK MP5, 94 project available.  Each Weldment Kit Contains: 1x Semi Auto Shelf Hanger Block 1x Rear stock bushing 1x Scope mounting piece 1x...
    HKP-01453
    $49.95
    Qty in Cart: 0
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    $49.95
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  • LSC/PTR Receiver Flat- MP5 9mm LSC/PTR Receiver Flat- MP5 9mm

    LSC/PTR Receiver Flat- MP5 9mm

    LSC

    $224.95
    MP5 Receiver Flat - PTR/LSC New PTR 9mm Receiver Flat made on the original LSC tooling. This flat is considered by many to be the most sought-after HK flat available on the market and perfect for that HK custom build. This item is not considered an FFL...
    HKP-01431
    $224.95
    Qty in Cart: 0
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    $224.95
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  • Chaote HK MP5K QD End Cap with Buffer - Black Chaote HK MP5K QD End Cap with Buffer - Black

    Chaote HK MP5K QD End Cap with Buffer - Black

    Choate

    $44.95
    Quick Detach MP5K, SP-89 Steel End Cap With Replaceable Rubber Buffer Compatible With: MP5K SP89 Clone or other custom builds
    HKP-20117
    $44.95
    Qty in Cart: 0
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    $44.95
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  • Flat Bending Jig Set For All HK Style Flats - Billeted - All Steel Flat Bending Jig Set For All HK Style Flats - Billeted - All Steel

    Flat Bending Jig Set For All HK Style Flats - Billeted - All Steel

    $599.95
    NEW LATEST 4th GENERATION 100% ALL STEEL VERSION AND DESIGN. THE FINEST JIG SET AVAILABLE! All steel billeted universal flat bending jig for all HK receiver flats including our new PTR .308 flats and the PTR/LSC flats. Each bending jig comes complete...
    HKP-19595
    $599.95
    Qty in Cart: 0
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    $599.95
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  • H&K HK MR556 Rear Lower Receiver Locking Pin

    H&K HK MR556 Rear Lower Receiver Locking Pin

    H&K Heckler & Koch

    $59.95
    HK MR556, MR762 Locking Pin With Spring Loaded Detent This is the rear takedown pin with ball detent and locking mechanism installed. The idea behind this type of system is to decrease the movement of the upper and lower receivers and improve the...
    HKP-02672
    $59.95
    Qty in Cart: 0
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    $59.95
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  • HKP SP5K 9mm Drop In Paddle Mag Release Upgrade Kit HKP SP5K 9mm Drop In Paddle Mag Release Upgrade Kit

    HKP SP5K 9mm Drop In Paddle Mag Release Upgrade Kit

    HKP HK Parts

    $74.95
    HK SP5K Anti-Rattle Roller Tipped "Paddle" Magazine Release Install Kit No modifications, no refinishing...complete drop-in kit included. New USA made busing for a drop-in install kit for the HK SP5K. This kit will allow any end-user to quickly,...
    HKP-18192
    $74.95
    Qty in Cart: 0
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    $74.95
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  • HKP MP5 End Cap with Sling Swivel HKP MP5 End Cap with Sling Swivel

    HKP MP5 End Cap with Sling Swivel

    HKP HK Parts

    $84.95
    HK Alloy Pistol End Cap with Sling Swivel Made from solid billet aircraft grade aluminum with the HK German sling loop and rubber heavy duty H buffer. With the alloy construction this unit will not break like the plastic end caps.  Compatible...
    HKP-18138
    $84.95
    Qty in Cart: 0
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    $84.95
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  • LSC MP5 9mm Receiver Flat LSC MP5 9mm Receiver Flat

    LSC MP5 9mm Receiver Flat

    LSC

    $199.95
    MP5 Receiver Flat - LSC LSC HK MP5 receiver flat is the most in spec flat that has ever been available. The best option for your HK German parts kit build. This flat is considered by many to be most sought after HK flat available on the market and...
    HKP-20555
    $199.95
    Qty in Cart: 0
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    $199.95
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  • PTR HK MP5 Flat Receiver w/ Weldment Set PTR HK MP5 Flat Receiver w/ Weldment Set

    PTR HK MP5 Flat Receiver w/ Weldment Set

    PTR

    $289.95
    MP5 9mm Receiver Flat With Complete Weldment & Rivet Set - PTR/LSC Several years ago PTR bought out LSC and now owns the tooling and dyes for the LSC 9mm flats. These elusive flats have been hard to find and are now available for the first time here...
    HKP-19509
    $289.95
    Qty in Cart: 0
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    $289.95
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  • Choate HK MP5 QD End Cap with Buffer - Black Choate HK MP5 QD End Cap with Buffer - Black

    Choate HK MP5 QD End Cap with Buffer - Black

    Choate

    $99.95
    Quick Detach Steel End Cap With Replaceable Rubber Buffer - HK MP5 With this MP5 QD end cap upgrade you will get a heavier buffer to internally protect your firearm and keep your bolt carrier in tip top condition for years to come. Machined aircraft...
    HKP-20118
    $99.95
    Qty in Cart: 0
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    $99.95
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  • Out Of Stock
    H&K MP5K/SP89/SP5K 9mm End Cap H&K MP5K/SP89/SP5K 9mm End Cap

    H&K MP5K/SP89/SP5K 9mm End Cap

    H&K Heckler & Koch

    $0.00
    HK Factory German MP5K, SP-89, & SP5K End Cap With Sling Swivel Each pistol end cap is OEM HK German MP5K and MP5K-N and has the HK German factory buffer.  Compatible With: MP5K SP89 SP5K MP5K-N MP5K-PDW MP5K Clone Or Other Custom Builds
    HKP-00394
    $0.00
    Qty in Cart: 0
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    $0.00
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  • H&K HK MR556/MR762 Receiver Take Down Tool

    H&K HK MR556/MR762 Receiver Take Down Tool

    H&K Heckler & Koch

    $19.95
    HK MR556 & MR762 Take Down Tool For The Upper & Lower Receiver This part is the tool used to tighten down the stock movement on the E1/E2 stock. Each tool will be stored in the rear of the E1/E2 stock. Please Note: We get...
    HKP-02653
    $19.95
    Qty in Cart: 0
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    $19.95
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  • HKP MP5K/SP89/SP5K 9mm End Cap - HK Style HKP MP5K/SP89/SP5K 9mm End Cap - HK Style

    HKP MP5K/SP89/SP5K 9mm End Cap - HK Style

    HKP HK Parts

    $64.95
    HKP MP5K/SP89/SP5K 9mm End Cap - HK Style This end cap is an identical reproduction of the factory end cap and features the original HK style buffer. Compatible With: MP5K SP5K SP89 In spec. clones and custom builds
    HKP-16135
    $64.95
    Qty in Cart: 0
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    $64.95
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  • H&K HK MR556/416 Receiver End Plate H&K HK MR556/416 Receiver End Plate

    H&K HK MR556/416 Receiver End Plate

    H&K Heckler & Koch

    $14.95
    HK 416, MR556 End Plate For Receiver & Buffer TubeFits all HK MR556 & HK 416 upper receiever/buffer tubes. New HK German manufacture.
    HKP-16603
    $14.95
    Qty in Cart: 0
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    $14.95
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  • Choate MP5K/SP89 9mm Steel End Cap W/ Buffer Choate MP5K/SP89 9mm Steel End Cap W/ Buffer

    Choate MP5K/SP89 9mm Steel End Cap W/ Buffer

    Choate

    $45.95
    MP5K & SP-89 Steel End Cap With Replaceable Rubber Buffer Fits perfectly on all HK MP5K-type builds or projects. All metal construction, so you know it will last. Each unit comes with a sling loop for use with multiple sling types. Compatible...
    HKP-00395
    $45.95
    Qty in Cart: 0
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    $45.95
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  • H&K G36/SL8 (5.56/.223) Sight Rail With Front & Rear Sights H&K G36/SL8 (5.56/.223) Sight Rail With Front & Rear Sights

    H&K G36/SL8 (5.56/.223) Sight Rail With Front & Rear Sights

    H&K Heckler & Koch

    $289.95
    H&K German G36 & SL8 Picatinny Sight Rail With Front And Rear Iron Sights Each rail works well with optics such as Eotech or Aimpoints. This is also a great part if you want a lower cheek weld and low-profile sight system. Made from durable...
    HKP-00274
    $289.95
    Qty in Cart: 0
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    $289.95
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  • H&K HK MR556/MR762 Front Lower Receiver Locking Pin H&K HK MR556/MR762 Front Lower Receiver Locking Pin

    H&K HK MR556/MR762 Front Lower Receiver Locking Pin

    H&K Heckler & Koch

    $59.95
    HK MR556 Locking Pin With Spring Loaded Detent This part is the front (large) takedown pin with ball detent and locking mechanism installed. The idea behind this type of system is to decrease the movement of the upper and lower receivers and improve...
    HKP-02663
    $59.95
    Qty in Cart: 0
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    $59.95
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  • H&K HK SL8, HK G36 Extended Bottom Rail Kit - Black H&K HK SL8, HK G36 Extended Bottom Rail Kit - Black

    H&K HK SL8, HK G36 Extended Bottom Rail Kit - Black

    H&K Heckler & Koch

    $99.95
    SL8 & G36 Extended Bottom Rail. This rail is the factory correct HK German manufactured bottom rail for the G36 or SL8 rifle. This allows the longest rail on the bottom of the polymer forearm. 9.25" in length overall. Comes with all mounting hardware...
    HKP-16549
    $99.95
    Qty in Cart: 0
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    $99.95
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  • Tac Latch - PTR Spec Tac Latch - PTR Spec

    Tac Latch - PTR Spec

    $69.95
    Tac Latch (latest Generation) PTR Spec - PTR .308 Firearms The new updated style of Tac latch is made specifically for the PTR 91 .308 receiver and will require very little modification to the firearm for installation. A major overhaul of the existing...
    HKP-17611
    $69.95
    Qty in Cart: 0
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    $69.95
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  • H&K Magazine Release Set H&K Magazine Release Set

    H&K Magazine Release Set

    H&K Heckler & Koch

    $184.95
    H&K Magazine Release Set This is the complete magazine release kit that includes both the paddle mag release and standard left-to-right mag release on your HK 9mm rifle or pistol build.  Compatible With: MP5, MP5K style 9mm models Set...
    HKP-02402
    $184.95
    Qty in Cart: 0
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    $184.95
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  • B&T MP5, SP5, 94 - Mid Range Scope Mount B&T MP5, SP5, 94 - Mid Range Scope Mount

    B&T MP5, SP5, 94 - Mid Range Scope Mount

    B&T Brugger & Thomet

    $119.95
    B&T MP5, SP5, 94 - Mid Range Scope Mount Perfect for your MP5, HK94, MP5K, MP5-SD or clone. Includes a witness hole so you can use iron sights with the mount installed. B&T Switzerland is a world leader in arms innovation. This same mount is in...
    HKP-16877
    $119.95
    Qty in Cart: 0
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    $119.95
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  • Out Of Stock
    HK G36 Backplate w/ Recoil Buffer HK G36 Backplate w/ Recoil Buffer

    HK G36 Backplate w/ Recoil Buffer

    USA

    $44.95
      HK G36 Backplate With Recoil Buffer New G36 Backplate with new G36/SL8 recoil buffer. This is a great spare or replacement to have on hand. These are also required for those that are doing the SL8-G36 conversions provided by Tommy Bostic &...
    HKP-18538
    $44.95
    Qty in Cart: 0
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    $44.95
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  • HK 416 10.4" Upper Gas Block - German HK 416 10.4" Upper Gas Block - German

    HK 416 10.4" Upper Gas Block - German

    $279.95
    HK German 10.4" Upper Gas Block Complete New HK German manufacture. This is the ONLY 10.4" gas block available from HK Germany. Compatible With: HK 10.4" uppers HK MR556 to 10.4" conversions Please Note: This unit is NOT a vented gas block.
    HKP-01543
    $279.95
    Qty in Cart: 0
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    $279.95
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