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Posted: 1/18/2021 1:08:54 PM EST
My son recently won an Anderson AR-15 Model B2-K850-A000 which has carbine length gas system but is low profile and has no front sight post. He'd like to replace the existing drop in handguard with and extended model, either M-Lok or quad rail, but doesn't like or need the cutout for the fsp. Does anyone make a drop-in model, preferably 13"-15" that doesn't have the cutout ?
Link Posted: 1/18/2021 2:09:54 PM EST
[Last Edit: 1/18/2021 2:12:30 PM EST by firepyro515]
The majority of drop in rails make use of the handguard cap to hold the front in. Not a lot of companies make a true drop in free float rail. Midwest Industries and Centurion arms have a couple models, but you would have to remove the delta ring and the handguard cap (if it is in place). If you are open to something shorter that will still cover the gas block, take a look at the Daniel Defense Omega rail. The new Omega rails are MLOK, but they top out at 9". If he is open to picatinny, then the older omega rail would work too. They were a lot longer.
Link Posted: 1/18/2021 2:19:06 PM EST
Drop in requires retention at both ends.

I.E. handguard retaining cap in front, delta pack at rear.


You could easily swap things out for a free float that attaches to std USGI barrel nut.
Link Posted: 1/18/2021 5:07:33 PM EST
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Originally Posted By Tigwelder1971:
Drop in requires retention at both ends.

I.E. handguard retaining cap in front, delta pack at rear.


You could easily swap things out for a free float that attaches to std USGI barrel nut.
View Quote


As far as I know, the DD Omega rail is one of the few drop in free float rails.
Link Posted: 1/18/2021 5:09:57 PM EST
Centurion C4. Just get a 12” model. It free floats.
Link Posted: 1/18/2021 5:41:59 PM EST
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Originally Posted By firepyro515:


As far as I know, the DD Omega rail is one of the few drop in free float rails.
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Originally Posted By firepyro515:
Originally Posted By Tigwelder1971:
Drop in requires retention at both ends.

I.E. handguard retaining cap in front, delta pack at rear.


You could easily swap things out for a free float that attaches to std USGI barrel nut.


As far as I know, the DD Omega rail is one of the few drop in free float rails.

True. Omega 12.0 is the longest,  IIRC?  Zero mods.

Not sure on whether or not it will clear the OP's GB though. Worth looking into.
Link Posted: 1/18/2021 6:18:38 PM EST
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Originally Posted By Tigwelder1971:

True. Omega 12.0 is the longest,  IIRC?  Zero mods.

Not sure on whether or not it will clear the OP's GB though. Worth looking into.
View Quote


The handguard cap is the only thing to worry about if you go past the GB. The other ones will just drop in with the handguard cap in place.
Link Posted: 1/18/2021 8:03:40 PM EST
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Originally Posted By firepyro515:


The handguard cap is the only thing to worry about if you go past the GB. The other ones will just drop in with the handguard cap in place.
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Originally Posted By firepyro515:
Originally Posted By Tigwelder1971:

True. Omega 12.0 is the longest,  IIRC?  Zero mods.

Not sure on whether or not it will clear the OP's GB though. Worth looking into.


The handguard cap is the only thing to worry about if you go past the GB. The other ones will just drop in with the handguard cap in place.

You are correct.
Link Posted: 1/19/2021 11:39:02 AM EST
Troy and Samson also make handguards that use the original barrel nut.  Though I doubt any of the rails mentioned including these will clear that gas block.
Link Posted: 1/19/2021 3:01:42 PM EST
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Originally Posted By Ryan_Scott:
Centurion C4. Just get a 12” model. It free floats.
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Great choice.
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