- Same Length as Mil-Spec A2 stock
- Uses Mil-Spec Rifle Buffer, Spring, & Buffer Tube
- Easy to Access Compartment for 20-Round Magazine
- Magazine Secured by a Standard Magazine Catch
The US Tactical Systems Back-Up Twenty stock features a compartment that will secure a straight 20-round magazine. The stock is constructed of strong, durable Zytel plastic with a clear window. The spare magazine is retained by a standard magazine catch and is easily removed. The butt plate rotates to the right of the weapon, exposing the spare magazine which can be easily ejected with the press of the magazine catch. The stock still features a standard sling loop and uses a mil-spec rifle buffer tube, spring and buffer which are not included.