Short Stroke Problem Solved!
Recently built an 18" Special Purpose Rifle (SPR) with Mid Length Gas System. I tried shooting with 55gr weak ammo such as PMC and others. The regular carbine buffer spring was just too stiffed for weak ammo to load the next round. I bought this spring from TTI and boom problem solved. The gun runs now with weak ammo. No more malfunctions. I ran all kinds of ammo 55gr all the way to 77gr. No problems. It was either this spring or $200 lightweight BCG. Less than $20 for this spring was a no brainer. This is a must have spring of you're running into short stroke issues. Recoil reduction and smooth soft when charging the charging handle! Great product!
