I have a S&W M&P15 and like it very much. Paid $870 for it OTD from a local dealer. Yes, I like to keep local guys in business.
The M&P15 is every bit equivalent to my Bushmaster carbines.
It's functioned 100% in 500 to 600 rds except for one case sticking incident and failing my "bad mag" function test, which I expected. I have a known bad mag that I keep for the purposes of checking functionality, and the S&W did hang up with two out of 30 rounds out of that bad mag. That's three less than my Bushy M4gery choked on.
I've fired XM193, Radway Green M193 "equivalent", Wolf 55 and Wolf 63 with only one case stick issue and it happened on the RG stuff. I collapsed the buttstock and smacked it on the bench seat and the case popped out when the carrier came back. I could not see anything with the case, or anything in the chamber that would have caused the case to stick, and the rest of the session was flawless.
I've not fired HP ammo from it, so I can't comment on functionality of hollow point.
It has been 100% functional on Wolf lacquered case and Wolf poly coated cased ammo.
It has a 5.56 chamber, and the upper and lower are Anchor forgings and the carry handle is made by Cardinal.
I headspaced it upon bringing it home new and it closed on a GO and didn't on a NO GO set of 5.56 gauges. Now after 500-600 rds it does the same.
There's a little rattly play in the buttstock, but then, so do my Bushies.
I had it out to the range a couple weeks ago, and one of the local State troopers was there with his new Colt 6000-series-whatever-the-f__k-model-number LEO-marked M4geries that PA has approved for them if they want to get one (with their own money). The state sez: "Only these models are approved for patrol use" and the particular Colt LEO-marked M4gery he had is on the short list. He had one or two FTFs or some kind trouble with each of six 30-rd mags fired using Federal American Eagle. I fired off four 30s and three 20s worth of RG through the S&W without issue and he came over to compare the two carbines after I was finished. He seemed favorably impressed.
I can nail claybirds propped up with short 2x4 blocks on the 200 yd berm, offhand. I can hit the 400 yard gong offhand 9/10 or 10/10 depending on what kind of day I'm having. Other folks at the range flip out because I'm not using a scope, and think that it's phenominal shooting. In this part of PA, they have been indoctrinated into thinking that a rifle cannot be fired unless a scope is installed first. They should try shooting this S&W with proper breath and trigger control and they'd understand how phvckin' simple it is to hit with.
When I bought the S&W I was looking for another M4gery because I intend to give my youngest my Bushy M4gery when she turns 18 next summer. The S&W's my keeper to replace the Bushy, and I bought the S&W because I'm a huge longtime S&W revolver fan/collector, and I have a Form 4 approval pending for a S&W M76 subgun.
This one is my rifle. There are many cheaper, but this one is mine . . .
HTH,
Noah