Spikes 9mm AR buffer tube spacer - need info from someone who has one.

[Claven2]

Could someone who owns one of the 9mm Spike's tactical buffer spacers please provide the thickness of the shoulder that acts as the spacer? The length of the tail is less important, but I'm working on an improved version of the spacer and need to know what depth the original is.

Thanks

This is the unit in question:

 

[Leg]

The shoulder isn't important. It's only there so the spring can keep it in place. The tail is what matters, it's what stops the bolt from travelling back too far.

 

[Claven2]

Right, I guess that dimension is important as well. The other dimension also matters though as it sets the spring pre-compression, increasing lock time.

Anyone know as well is it solid, or hollowed at the base?

 

[Claven2]

Nevermind - I ordered one and will measure it myself.