Use a short buffer tube on that pistol build. Just add your bolt and small parts and buy a $5 (or so) factory carbon fiber pistol buffer tube from Bushmaster.
For sale excellent condition chrome factory pistol carrier with buffer and recoil spring. Exactly what you see in the picture......$55 shipped!
SALE PENDING to 303_enfield
Paypal or money order....IM me or e-mail me here email@example.com