Question about small pin lower receivers?

Ok - I have a Spikes Tactical lower complete M4 lower (.223/556) and I want to purchase the Super 3 gun trigger by Geissele. The trigger is for "small pin (milspec) lower receiver". Since the lower is milspec, the trigger should fit correct?

I just want to make sure before I order..

Assuming that they are made to spec, a small pin lower (.154/.155) will fit.

Quote:

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Originally Posted by neo9710

Ok - I have a Spikes Tactical lower complete M4 lower (.223/556) and I want to purchase the Super 3 gun trigger by Geissele. The trigger is for "small pin (milspec) lower receiver". Since the lower is milspec, the trigger should fit correct?

I just want to make sure before I order..

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