HK33 / HK53 / HK93 Receivers / Uppers
Upgrade the core of your HK33, HK53, HK93. Choose from genuine HK receivers, high-quality US-made options, and custom receivers for specialized builds.
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HK Stock Pin Bushing Weldment
HKP HK Parts
$3.95HK Stock Push Pin Bushing Weldment All-steel stock pin bushing weldment for welding in the rear of the flat. This bushing welds into the folded flat and guides the large push pin through the receiver to hold the stock to the receiver. Compatible...HKP-17573$3.95 -
HK Barrel Pin Retaining - 5mm - Standard Size
H&K Heckler & Koch
$9.95H&K HK Pin - Barrel - Retaining - 5mm - Standard Size Barrel Retaining Pin Each barrel pin is used for installing a new or replacement barrel. HK suggest using a new factory barrel pin when installing or reinstalling a HK barrel. We also offer the HK...HKP-00071$9.95 -
HK Oversized Barrel Retaining Pin - 5.25mm
H&K Heckler & Koch
$9.95H&K Oversized Barrel Retaining Pin - 5.25mm This is the barrel pin used for installing a new or replacement barrel. HK suggests using a new factory barrel pin when installing or reinstalling an HK barrel in the trunnion. Each pin is slightly...HKP-16954$9.95 -
HK MP5, MP5K, G3, HK93 Paddle Magazine Release - Extended - EMR
HKP HK Parts
$44.95HKP HK Parts Paddle Style Extended Magazine Release with EMR for HK MP5, HK G3, HK 33 and more A great addition to any paddle style mag release, such as those found on an HK. The extended mag release is machined from a solid billet of aircraft grade...HKP-17079$44.95 -
HK MP5, MP5K, HK33, HK53, HK93, HK91, G3 Cocking Tube Hanger Clip
H&K Heckler & Koch
$13.95Heckler and Koch Cocking Tube Hanger Clip The HK cocking tube support hanger is the part that welds onto the end of the cocking tube that allows the forearm to install with the use of a small push pin. New HK German factory manufactured. Ready to weld...HKP-00349$13.95 -
HK Semi Shelf Weldment - Metal Grip Housing
HKP HK Parts
$14.95HKP Semi Shelf Weldment Metal Grip Housing For Semi-Auto Trigger Packs This HK German specification metal trigger frame weldment is designed for converting SEF style housings from full auto to semi-auto. This weldable block or shelf is essential for...HKP-16657$14.95 -
HK33, HK53, HK93, HK91, G3 Rear Sight Base Weldment
HKP HK Parts
$29.95HKP HK Parts Rear Sight Base Weldment for HK G3, HK91, PTR & HK93, 33 & 53, FMP21 New US manufactured billeted from solid ordnance grade bar stock. Perfect for roller lock or other custom builds. Each unit is precisely machined and the best rear...HKP-17386$29.95 -
HK MP5, HK33 HK53, HK93 Paddle Mag Release Bushing - Full Auto
H&K Heckler & Koch
$6.95Heckler and Koch New Full Auto Paddle Magazine Release Bushing for HK MP5 and HK90 New HK German paddle magazine release bushing for all 90 series HK weapon systems. Used for installing a paddle mag release. Please Note: This is NOT for use on...HKP-00847$6.95 -
HK Picatinny Rail For HK Receivers - 17 Slot
HKP HK Parts
$69.95HKP Picatinny Rail For HK Receivers - 17 Slot Mil-Spec all steel Picatinny rail in the white. Relief cut for HK receivers and made for mounting scopes and optics to HK builds. This unit easily welds to the top of your HK receiver. Compatible With: HK...HKP-01446$69.95 -
Receiver Shelf - Semi Auto - Billeted
$19.95Semi 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 -
HK MP5, HK90 Series Magazine Catch Roll Pin - Push Button
H&K Heckler & Koch
$4.95Heckler and Koch Magazine Catch, Push Button Roll Pin New HK German-made. The mag catch roll pin is used to attach the magazine catch to the mag release button. Compatible With: MP5, SP5 MP5K, SP5K SP89, HK94 HK91, G3, PTR HK33, HK53,...HKP-01918$4.95 -
HK Receiver Flat Bending Jig Set - Billet Aluminum
HKP HK Parts
$449.95Flat Bending Jig Set For All HK Style Flats - Billeted - Aluminum Aluminum billeted universal flat bending jig for all HK receiver flats including PTR .308 flats and the PTR/LSC flats. Each bending jig comes complete with all the pieces you need for...HKP-19583$449.95