HK Rifle / SMG Parts
Elevate Your HK Rifle with Premium Parts – MP5, HK416, SP5, and More!
Enhance your HK rifle with top-notch parts and accessories. From HK MP5 and HK MP5K to HK SP5 and HK UMP or HK USC, we offer a vast selection. Discover high-quality magazines, binary triggers, stocks, grips, barrels, handguards, sights, and more for your firearm. Whether you own an HK416, HK SP5K, HK G36, or HK MP5 22, we have the Heckler and Koch rifle parts you've been looking for. Shop now to upgrade your rifle to perfection.
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HK MP5K, SP5K Binary Trigger Group - SEF Ambi - BFSIII - 9mm - Contoured
FA Franklin Armory
$1,499.95 - $1,549.95Franklin Armory HK MP5K - BFSIII HK-C1 – Binary Trigger Group – SEF – Contoured In position 3 it will fire 1 round on pull and 1 round on release. With a 4.5 lb trigger pull, making this the fastest semi-automatic trigger on the market...$1,499.95 - $1,549.95 -
On Sale
HK91, G3 Buffer Spring - Surplus
H&K Heckler & Koch
Now: $4.46Was: $4.95HK G3, 91 Buffer Spring - Surplus This is the factory buffer spring for the rear stock buffer found on the G3, HK91, 93 A2 style stocks. This is a used excellent shape spring. A great replacement to have on hand for your worn out buffer spring...Now: $4.46Was: $4.95 -
Out Of StockOn Sale
MR556 Upper Receiver Kit -16.5" - M-LOK
H&K Heckler & Koch
Now: $1,601.96Was: $1,779.95New HK Factory German MR556 Upper Kit with M-LOK forearm Includes: Complete MR556 upper receiver with M-LOK forearm MR556 Bolt group Complete Tungsten Filled HK Buffer HK Buffer Spring One 30 Round HK Steel Maritime Magazine No FFL required as the...Now: $1,601.96Was: $1,779.95 -
On Sale
HK USP, HK45, UMP Flash Hider - .45 ACP - 5 Prong - Threaded 16x1 LH
HKP HK Parts
Now: $79.96Was: $99.95HK USP, UMP, HK45 Flash Hider - .45 ACP - 5 Prong - Threaded 16x1 LH 5 prong flash hider for .45 ACP firearms featuring a 16x1 LH threaded barrel. No timing/shims necessary. Compatible With the Following Firearms Threaded 16x1 LH: HK UMP/USC HK45...Now: $79.96Was: $99.95 -
Out Of StockOn Sale
PTR HK G3/91 (7.62x51/.308) Locking Piece- 45 Degree
PTR
Now: $19.75Was: $21.9545 Degree Locking Piece - US Made PTR standard 45 degree locking piece made in the USA by PTR and is design to be a direct replacement for all .308 HK style firearms. Compatible With: G3 PTR 91 HK 91 Other costume clonesNow: $19.75Was: $21.95 -
On Sale
HK91, G3 SEF Navy Style Trigger Housing - Push Pin
H&K Heckler & Koch
Now: $67.45Was: $74.95H&K G3/91 (7.62x51/.308) SEF Navy Style Trigger Housing - Push Pin This German-made Heckler & Koch housing comes in black polymer. This part is compatible with all push pin G3 style firearms. It can also be used for other...Now: $67.45Was: $74.95 -
On Sale
HK91, G3 Fixed Stock with Enhanced Heavy Buffer - OD Green - Surplus
H&K Heckler & Koch
Now: $116.95Was: $129.95HK 91, G3 Fixed Stock with Enhanced Heavy Buffer Installed - OD Green - Surplus Used Olive Drab green German surplus stock complete with Enhance DMR buffer installed. Ready to drop in on your HK or clone rifle. Used in perfect working condition. Each...Now: $116.95Was: $129.95 -
On Sale
HK MP5, MP5K 3-Lug Blank Firing Adapter
H&K Heckler & Koch
Now: $152.95Was: $169.95H&K MP5/MP5K 3-Lug Blank Firing Adapter This part attaches to the end of the 3-lug barrel tip and will allow the use of 9mm blanks for training. A brand new HK German manufactured part. Specifications: 3-Lug Blank Firing Adapter Compatible...Now: $152.95Was: $169.95 -
Out Of StockOn Sale
HK MR556 A4 Upper Receiver Kit - 11"- M-LOK
H&K Heckler & Koch
Now: $1,799.06Was: $1,998.95H&K Heckler & Koch MR556 Upper Receiver Kit A4 -11″ - M-LOK This kit includes a complete upper receiver/barrel assembly, allowing Mil-Spec 5.56mm AR-style rifles to be retrofitted to HK’s piston and pusher rod system. This...Now: $1,799.06Was: $1,998.95 -
On Sale
HK MP5, SP5 Trigger Housing - AR - 9mm
Magpul
Now: $269.95Was: $299.95Magpul HK MP5/SP5 9mm AR Trigger Housing With our new MP5 AR style trigger housing you can have the desired Navy pictograph look with the versatile options of trigger guards to fit your shooting style and the option of storage inside the magpul grip...Now: $269.95Was: $299.95 -
On Sale
HK MP5K, SP5K, SP89 Leather Sling - Single Point - Dark Brown
HKP HK Parts
Now: $39.96Was: $49.95Single Point Leather Sling - Dark Brown Our leather sling utilizes two HK style sling hooks to attach to a single mounting point. Designed to replicate the original, out of production, German HK offering. Each sling is handcrafted in the US by a German...Now: $39.96Was: $49.95 -
On Sale
HK417, MR762 Castle Receiver Extension Nut for Buffer Tube
H&K Heckler & Koch
Now: $40.46Was: $44.95H&K HK MR762/417 Castle Receiver Extension Nut For Buffer Tube - Black New HK German manufacture and the factory correct offering with the proper installation screws and staking guides. Compatible With: HK MR762 HK 417Now: $40.46Was: $44.95