Anonymous
8/3/2025, 10:54:19 PM
No.64072673
>>64070442
if all you're worried about is reliability then caliber doesn't matter. the parts you use or the make of the upper would be what matters. things like gas port size and buffer weights or an adjustable gas block even. 300blk is more forgiving in an sbr but since you mentioned full auto then you need to consider ammo cost and that really does leave you with 5.56. or 9mm I suppose but sounds like you want a rifle caliber.
if all you're worried about is reliability then caliber doesn't matter. the parts you use or the make of the upper would be what matters. things like gas port size and buffer weights or an adjustable gas block even. 300blk is more forgiving in an sbr but since you mentioned full auto then you need to consider ammo cost and that really does leave you with 5.56. or 9mm I suppose but sounds like you want a rifle caliber.