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View Full Version : Replacing a Vortex SPARC AR or a Holusun 403c with a Aimpoint PRO



hunterspirit
11-27-2016, 10:44 AM
SPARC AR is on a BCM BFH Midlength .625" gas block

Holosun 403c is on a Spikes Optimum Midlength .750" gas block

Both are sighted in and work well. I have 2 403c's that I have FedEx shipping confirmation from Optics Planet on

Which one would you replace with the PRO :?:

no im not squinting
11-28-2016, 08:44 PM
The one you would grab if SHTF.

oldmann1967
11-29-2016, 09:49 PM
SPARC AR is on a BCM BFH Midlength .625" gas block

Holosun 403c is on a Spikes Optimum Midlength .750" gas block

Both are sighted in and work well. I have 2 403c's that I have FedEx shipping confirmation from Optics Planet on

Which one would you replace with the PRO :?:

Why are they mounted on the gas blocks? Isn't it way too far forward?

hunterspirit
11-30-2016, 07:54 AM
Why are they mounted on the gas blocks? Isn't it way too far forward?

625 is a pencil barrel, 750 is a modified Government profile, both have FSB's,I should have been more clear
Optics are mounted on A4 Upper Receiver's marked M4

Anyway the Spikes runs better than the BCM and will get the AimPoint treatment