I've got a SiCo Omega and four Dead Air Sandmans so with a KeyMo mount, I can run any on the 553's. The 553R with Omega and direct thread and four position piston was very soft-shooting when I tried last fall. I run a dedicated Sig SRD556 on one 553...didn't want to use a mount for it due to clearance on the gas system on my 9".
You should be able to clear with any mount on a 553-LB though.
| 92 - Billennium | Steel-I/96 Stock | WC BrigTac| Elite II | 90-Two G | Inox Brig |
| 85FS Cheetah | 71 Jaguar | 21a Bobcat | 3032 Tomcat | Model 90 Armi Roma |
| Sig - 551-A1 ODG | P553 | 522 | P320 FDE |
| Noveske 10.5" Pistol | AP 12.5" | AP Tungsten SPR | DDM4 V7 in MSP & Elcan |
| 308 - DSA FAL & Steyr Scout in grey |
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