Booster threads are 1-3/16 x 24.
Booster assembly includes a piston
For Booster lockout you must read the disclaimer before purchase (below).
Weight: 0.12 lbs
Dimensions: 2 x 2 x 2 in
Size:1/2 x289mm Caliber .22LR, 5.56mm,
578×28.USA 45 ACP Caliber,
13.5 x 1 LH 9mmavailable
5/8x24, 16×1 LH, needs to be customized
Package Included:1x Aluminum Black Shell
1x Aluminum Black Cap
1x Stainless Steel Spring
1x Stainless Steel Piston