The Daniel Defense DDM4/ SLIM/ Lite Rail III Hardware pack is compatible with DDM4 Rail, SLiM Rail, or the AR15 LITE Rail III handguard. It will not work with the Midwest Industries 9.25in Combat Rail T-Series One Piece Free Float Handguard.
Yes, the Midwest Industries 9.25in Combat Rail T-Series One Piece Free Float Handguard will work with a Rock River Arms Heavy Barrel.
No, it will not work with the Sig Tread.
Yes, it should fit on your AR pistol, provided it is not too long. This handrail is 9.25"
Yes, it will work just fine.
Please email us at techsales@opticsplanet.com so we can further answer your question.
This will fit fine on a BCM upper.
Please email us at techsales@opticsplanet.com so we can further answer your question.
This will fit on a Ruger 556 Pistol.