I finally got around to itemizing the list of parts from both the M14 and EBR chassis to see what was and wasn't included
RED = MISSING
M14-6 - Dust cover bearing
M14-7 - Dust cover bearing screw
M14-10 - Sling swivel screws (2x)
M14-39 - Washer, sling swivel (2x)
M14-40 - Stock liner
M14-66 - M14 full length outer barrel
M14-67 - Front band
M14-78 - M14 stock
M14-79 - Handguard
M14-80 - Ferrule
M14-90 - Handguard retaining clip
M14-91 - Buttstock end plate
M14-92 - Buttstock door
M14-94 - Buttstock part
M14-95 - Buttstock part
M14-96 - Buttstock part
M14-97 - Butt sling swivel
M14-98 - Front sling swivel
M14-100 - Buttstock part
M14-101 - Dust cover
M14-103 - Stock liner screw (2x)
M14-111 - Buttstock detent spring
M14-112 - Buttstock detent
M14-113 - Buttstock pin (2x)
M14-114 - Upper buttstock screw
M14-115 - Lower buttstock screw
M14-116 - Buttstock part
M14-133 - Screw
EBR-17 - Clip guide rail segment
EBR-29 - EBR gas cylinder lock
EBR-45 - Flash hider
EBR-46 - Front sight
EBR-47 - Front sight post screw
EBR-48 - Sage EBR op rod guide
EBR-51 (short) - EBR length inner barrel
EBR-52 - Op rod guide pin
EBR-53 - Op rod guide screws (2x)
ORANGE = DAMAGE LIKELY NOT CAUSED BY WEAR AND TEAR
M14-13 - Trigger (catch filed down likely to deal with trigger housing misalignment symptoms)
M14-66/EBR-51 (short) - EBR short barrel (damage to op rod guide pin hole, causing excessive unwanted motion)
M14-144 - Op rod guide pin (severe damage and slightly bent)
YELLOW = OTHER DISCREPANCIES
M14-1 - M14 receiver (normal wear and tear but several dead bugs found inside)
M14-28 - Hammer housing (right) (known-issue deformation already occurring despite claim of only 160 rounds shot)
M14-29 - Hammer housing (left) (known-issue deformation already occurring despite claim of only 160 rounds shot)
M14-77 - Gas cylinder pin (not correct 2x8mm dimension, wrong pin likely used)
*** - Bolt nozzle (365fps chrono'd with 0.25g bbs means ~400fps with 0.20g, stock nozzle)
Most of these I do not actually care about as I will be running this exclusively in the EBR chassis, but it is still annoying considering it was promised (except the buttstock door).
I believe that the receiver shown in the ads is not the one I received with a few points of evidence:
1. Ad shows M14 length (longer) outer barrel with the front band (part M14-67) present. I received an EBR length (shorter) outer barrel, front band is not present.
2. Ad shows M14 flash hider (one-piece assembly) painted orange. EBR flash hider is a two-piece assembly, allowing different flash hiders to be fitted while keeping the front sight. I received an unpainted M14 front sight - perhaps paint stripper was used, but why not show that in the ad? Shouldn't the orange tip be used while shipping replica firearms anyway?
3. Damage to the op rod guide pin and where it contacts the outer barrel is not normal, it was either caused by hammering in the pin with the components misaligned or using a different (and defective) part.
4. M14 length inner barrel is provided despite the EBR length outer barrel. It is 540mm long, about 20mm too long to even fit in the huge M14 flash hider with the EBR outer barrel. Having the outer barrel in the ad and the inner barrel actually ship, all signs point to you having the entire M14 barrel assembly so why was it swapped out?
5. Dead bugs stuck in the grease in the rear of the receiver, an area requiring a complete teardown to clean, shows that this gun may have sat either outside or in storage for an extended period of time. There were also heavy dust and other organic buildup in certain hard-to-clean areas (inside the EBR stock and under the upper rail for example)
6. Trigger box splitting is a known issue, although most people on multiple sources (Airsoft Society, HRC discord, Airsoft Sniper Forum, redit) claim 500-1000 shots before it happens. I understand the lack of control in regards to tolerance in this industry, but 160 claimed shots in a 'full working condition' rifle probably won't have those problems.
7. There are wear marks indicating screws were used to secure the EBR op rod guide, which is different from the standard M14 one. The op rod guide was not included despite being necessary for the EBR chassis to function well - there is no left-right stabilization or bedding, and the op rod guide screw holes are not threaded to use set screws. I have severe barrel vibration and movement left/right while shooting because of this until I can get the part in.
Best case scenario is that Gunner sent me the wrong M14 action mistakenly. Worst case scenario is that this was a misrepresented item, and I have not received the depicted item that I paid $400+ for. Responding to PMs would allow us to work out the issue regardless of reason, but this never happened. Note that at the time of this posting he was active on AS yesterday, 4/16.
Due to the fact that this happened and the zero post-sale communication despite visible forum activity means that I do not think Gunner is willing to rectify this situation and as such I would not recommend anyone buy from him in the future. For those of you looking at his other listings, be wary.