PK Firearms Logo

Your home for AR-15 parts & accessories!

PK Firearms Logo

MIL SPEC 6 Position Receiver Extension COMPLETE KIT

$39.95
SKU: 
21

This kit is contains all the necessary parts to mount a Mil-Spec stock receiver extension to a lower receiver. Kit contains 6 position receiver extension, castle nut, stock ring, buffer and spring. Buffer upgrades available.


ACE M4 SOCOM Stock - COMPLETE KIT

$184.00
SKU: 
96

M4 SOCOM Designed with input from combat experienced SF soldiers. This is the strongest production AR15/M16 stock available! Approximately 6 times stronger than an AR15 A2 stock & receiver extension tube. Ideal for CQB or breaching doors, and without the fear of bending the receiver extension tube ( which disables the rifle ). Adjustable length of pull, adjusts from 7.5" to 9.5" in five 1/2" increments. Closed-cell foam overtube provides an extremely comfortable cheek weld.


ACE Skeleton ENTRY Stock - COMPLETE KIT

$99.00
SKU: 
98

ARFX-E Entry stock. This stock is only 7.25" long without recoil pad; yet is strong enough for its intended purpose "Close Quarters Battle." CQB usually involves heavy armor and the need for a stock that can be used to breech light doors or in hand to hand combat. Special receiver extension tube, Sling swivel, foam overtube and  .5" recoil pad are included. Length 7.25". L.O.P.=10.45" (without recoil pad ) Weight: 265g ( 9.7 oz) .  Kit includes carbine spring and buffer.  Buffer upgrades available.


COMMERCIAL Stock Extension COMPLETE KIT

$37.95
SKU: 
295

This kit is contains all the necessary parts to mount a Commercial 6-position receiver extension to a lower receiver. Kit contains receiver extension, castle nut, stock ring, buffer and spring. Available options for different buffers.



Magpul CTR Stock - COMPLETE KIT - COMMERCIAL

$84.00
SKU: 
635

Choose color below

The CTR is a replacement carbine stock body, adjustable for length of pull. This stock features a unique locking mechanism that friction locks the stock to the buffer tube for zero movement. Kit includes a 6 position commercial buffer tube, castle nut, stock plate, carbine buffer and spring. Buffer upgrades available. Available in Black, Dark Earth, & OD Green.



Magpul CTR Stock - COMPLETE KIT - MILSPEC

$89.95
SKU: 
638

Choose color below

The CTR is a replacement carbine stock body, adjustable for length of pull. This stock features a unique locking mechanism that friction locks the stock to the buffer tube for zero movement. Kit includes Butt Plate, 6 position mil-spec buffer tube, castle nut, stock plate, carbine buffer and spring. Buffer upgrades available. Available in Black, Dark Earth and OD Green



Magpul MOE Stock - COMPLETE KIT - COMMERCIAL

$69.95
SKU: 
670

Choose color below

The MOE Stock is a variation of the popular Magpul CTR. The MOE version is meant to supplement, not replace the existing CTR. The Magpul Original Equipment (MOE) stock does not have the QD socket, or friction lock, but feels and looks very similar to its CTR cousin. Kit includes a 6 position commercial buffer tube, castle nut, stock plate, carbine buffer and spring. Buffer upgrades available. Available in Black, Dark Earth & OD Green.



Magpul MOE Stock- COMPLETE KIT - MILSPEC

$74.95
SKU: 
676

Choose color below

The MOE Stock is a variation of the popular Magpul CTR. The MOE version is meant to supplement, not replace the existing CTR. The Magpul Original Equipment (MOE) stock does not have the QD socket, or friction lock, but feels and looks very similar to its CTR cousin. Kit includes a 6 position milspec buffer tube, castle nut, stock plate, carbine buffer and spring. Buffer upgrades available.  Available in Black, Dark Earth & OD Green.


Rock River Arms PISTOL Receiver Extension Kit

$40.00
SKU: 
920

Rock River Arms pistol receiver extension kit for pistol lower receivers. Includes fluted and knurled pistol receiver extension, car buffer, car buffer spring, and ambi loop pistol receiver plate. Available options for different buffers.



Rock River Arms OPERATOR Stock - COMMERCIAL

$99.00
SKU: 
1327

Rock River Arms, "Operator" 6 position stock. Features a rubber, push button, vertical adjustable butt pad along with waterproof battery storage. Holds 2 AA or 3 123A batteries per side. Two Ambi QD sling swivel sockets. Low profile adjustment lever. Includes Commercial receiver extension,  end plate,  castle nut, buffer spring and standard CAR buffer.

Available in Black and Tan.

Options available for buffer upgrades.


Pages