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Old 05-28-2019, 04:17 PM
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Default Original M&P AR15 modification question

Probably been discussed before but I did search. I have one of the 1st gen ar15's M&P. From what I see the sport II difference is mainly the Forward Assist & Dust Cover?

Can mine be upgraded or is not worth the $$$?
I was going to buy a new one but figured I would ask first.
Thanks folks
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Old 05-28-2019, 04:26 PM
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Forward assist, ejection port cover, and barrel (if you got a Sport with the 1:8 twist, 5R barrel) are the big differences.

To "upgrade", you would have to buy a stripped upper and move your barrel over to it. I don't think it is worth it.
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Old 05-28-2019, 05:06 PM
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OK. Thanks. Appreciate the response.
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Old 05-28-2019, 07:13 PM
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Lot of rifles, civilian and military, don’t have a forward assist or a dust cover and have been used in all environments successfully. I like having them but I wouldn’t change what you have for that level of expense.
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Old 05-28-2019, 09:57 PM
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Thanks vonn
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Old 05-28-2019, 11:19 PM
ameridaddy ameridaddy is offline
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Pathfinder, that was my first AR, and I added an EoTech, changed the scritchy trigger, added a two-point sling, changed the pistol grip to one that fit my hand better. It's still going strong after ~10 years now.
IIRC, the original M&P15 had a chrome lined barrel, whereas the Sport did not, along with the FA and dust cover deletions.

Last edited by ameridaddy; 05-28-2019 at 11:21 PM.
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Old 05-29-2019, 12:36 PM
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OK Thanks ameridaddy. I had considered the trigger before also. I may perhaps just do that.
But with the replies above including yours I will not be doing anything about FA or Dust cover.
Thanks
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Old 05-29-2019, 02:07 PM
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Quote:
Originally Posted by Pathfinder69 View Post
OK Thanks ameridaddy. I had considered the trigger before also. I may perhaps just do that.
But with the replies above including yours I will not be doing anything about FA or Dust cover.
Thanks
I used the Rock River two-stage trigger; nice and crisp, good value for the money I think.
I'm sure a Timney or Geissele would be better, but double the bucks of the RR or more.
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Old 05-29-2019, 02:42 PM
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Another trigger to look at is the Larue MBT @$87.00. Also a two stage. Can be had with either a straight or curved trigger bow.

Triggers
- LaRue Tactical
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Old 05-29-2019, 07:28 PM
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Thank Guys. I will look at the triggers mentioned above. I am hoping it is something I can do myself. Way back when, I remember taking my M-16 apart and putting it back together blindfolded-That was in Pathfinder school iirc.
I build computers and play lots of guitar so my hands are well tested.
Frank
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Old 05-29-2019, 09:43 PM
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Ejection port and forward assist on civilian rifles is mostly cosmetic. I wouldn't bother upgrading just to get those. Way too much work and money.

I will second the motion to proceed on adding a Larue Tactical MBT 2 stage trigger. Amazing! IMO best bang for the buck trigger on the market.


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Another trigger to look at is the Larue MBT @$87.00. Also a two stage. Can be had with either a straight or curved trigger bow.

Triggers
- LaRue Tactical
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Old 05-30-2019, 12:30 PM
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Thanks luger. I am looking at the trigger options....
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Old 05-30-2019, 01:39 PM
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Quote:
Originally Posted by Pathfinder69 View Post
Thanks luger. I am looking at the trigger options....
You're welcome!

If you get lucky Larue will give you some Dillo Dust.
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Old 06-01-2019, 09:31 PM
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Personally, I wouldn't do anything to that original Sport...still wish I had mine. I have the Sport II now, with upgraded furniture and charging handle, but I actually think my original Sport was just a tad more accurate.
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Old 06-04-2019, 01:26 PM
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Since the subject of triggers has been brought up, I installed a 3lb Timney trigger in mine and there is a world of dfference. Very nice trigger and easy to install.
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Old 06-21-2019, 05:55 PM
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Just buy a complete upper in the configuration you wish, then swap out when the whim strikes. If you also want to play with different barrels or gas systems; buy them and drop them on. If buffer/recoil spring changes are recommended, those aren’t very expensive either.
You’ve got a Lego gun! Enjoy!!
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