Need Buffer "Weights" Help Please

[t1tan]

I have never done this, but have heard of guys putting spaces in the 'bottom' of the receiver extension. Would this work in Diamondback's case?

I'd imagine so, the JP SCS uses spacers for rifle/A5 length tubes

[Todd.K]

I have never done this, but have heard of guys putting spaces in the 'bottom' of the receiver extension. Would this work in Diamondback's case?

Yes. Back in day a manufacturer (maybe even Colt) made the spacer for running a 9mm upper, 9mm buffer (CAR length), and carbine spring in your A2 lower.

I'd always run a rifle spring and buffer in a rifle receiver extension for 5.56 though.

[Diamondback]

In short, the buffer isn't just there to slow the carrier and shove it back in, it's a hard mechanical spacer that prevents overtravel. Gotcha. For the record, I was asking in a theoretical "why the system is the way it is" context--I'm solidly in the A5 camp unless a build *requires* me to go either CAR or fixed-stock Rifle.

For my own builds, my arms are too short for a fixed, so on Rifle-length builds I'm A5 (custom) or CAR-H6 (A4 clone) all the way--dunno how I'm gonna make a Nam Spec work, but there had to be some Stubdudes in Indian Country so I'm sure there was a workaround.