Short AR builds

[Alan]

For those of you running short-barreled ARs in the 10.5–12.5 range, I’d love to know what setups you’ve discovered that manage to balance smooth cycling while minimizing gas blowback. What recoil systems and gas configurations have you found to be the most effective?

 

[Alpha-17]

My DD Mk 18 upper has been reliable from the get go. H3 buffer and red Sprinco spring help keep it relatively smooth. It's not a 16" or 20" AR, so it'll never run that smoothly, but it'll work great. Taming the blast is another issue.