HK91 / G3 / HK51 Receivers / Uppers
Upgrade the core of your HK G3/91 or PTR 91. Choose from genuine HK receivers, high-quality US-made options, and custom receivers for specialized builds.
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On Sale
HK Stock Pin Bushing Weldment
HKP HK Parts
Now: $3.16Was: $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...Now: $3.16Was: $3.95 -
On Sale
HK Pin - Barrel - Retaining - 5mm - Standard Size
H&K Heckler & Koch
Now: $8.96Was: $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...Now: $8.96Was: $9.95 -
On Sale
HK90 Series Mag Paddle Bushing with Pin for Semi Builds
DTAC Dakota Tactical
Now: $8.90Was: $9.89DTAC Mag Paddle Bushing With Pin For Semi-Builds This part is made 100% in the US from 17-4 stainless steel. Latest production with patent pending anti-binding enhancement upgrade. Accurate tolerance for easy movement with minimal play. It has an...Now: $8.90Was: $9.89 -
On Sale
HK91, G3 Receiver Flat - US Made
PTR
Now: $89.95Was: $99.95HK 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...Now: $89.95Was: $99.95 -
Out Of StockOn Sale
HK91, G3, CETME Receiver Flat with Weldment Set
PTR
Now: $150.25Was: $166.95HK91, 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 transfer is required as this is an un-folded flat. Compatible...Now: $150.25Was: $166.95 -
On Sale
HK MP5, MP5K, HK33, HK53, HK93, HK91, G3 Hanger Clip - Cocking Tube
H&K Heckler & Koch
Now: $12.55Was: $13.95H&K 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 onto your...Now: $12.55Was: $13.95 -
On Sale
HK91, G3 Rear Push Pin Reinforcement Weldment
PTR
Now: $17.95Was: $19.95HK91, G3, PTR, CETME Push Pin Reinforcement Weldment HK91/G3/PTR91 or CETME steel receiver flat weldment that is added to the rear of the receiver where the 2 large stock push pins install to reinforce this section of the receiver against damage or use...Now: $17.95Was: $19.95 -
On Sale
HK Semi Shelf Weldment - Metal Grip Housing
HKP HK Parts
Now: $11.96Was: $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...Now: $11.96Was: $14.95 -
On Sale
HK Picatinny Rail For HK Receivers - 17 Slot
HKP HK Parts
Now: $55.96Was: $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...Now: $55.96Was: $69.95 -
On Sale
HK91, G3 Weldment Set Complete
HKP HK Parts
Now: $63.96Was: $79.95HK G3, HK91, PTR Weldment Set Complete New US manufactured billeted from solid ordnance grade bar stock. Perfect for roller lock or other custom builds. Each weldment set unit is precisely machined. Includes: Rear sight base Semi auto shelf 2 X rear...Now: $63.96Was: $79.95 -
On Sale
HK Receiver Flat Bending Jig Set - Billet Aluminum
HKP HK Parts
Now: $314.97Was: $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...Now: $314.97Was: $449.95 -
Out Of StockOn Sale
HK Picatinny Rail For HK Receivers - 15 Slot
HKP HK Parts
Now: $47.96Was: $59.95HKP Picatinny Rail For HK Receivers - 15 Slot Mil-Spec all steel CNC'ed picatinny rail in the white, relief cut to fit flush and low profile on HK receivers. The most solid and consistent mounting platform made for mounting scopes and optics to HK builds...Now: $47.96Was: $59.95