Yes I remember what a shit storm this was. I thought it would be funny to post that. The Enterprise debacle pretty much turned me off on the whole BGS kit build craze, which was disappointing because they were awesome kits. I built on mine because I was afraid to send it back to Enterprise. I ended up having to file the feed ramp down because the bolt wouldn’t even close. It ended up working eventually, but I was so soured by the crap receiver I sold my BGS build. Harley I remember you were in on it also. How did it end up working out for you?
CTW, below is the list of defects that I mailed to Entreprise regarding the paperweight they initially sent me. The replacement receiver they sent was not perfect but was buildable. I’ve shot a few hundred rounds through it with no issues.
Structural Issues
Casting Porosity – Several porosity cavities and pinholes are visible inside & outside of the rear portion of the casting. This is not acceptable on a new receiver. (Photo #1)
Feedramps – The feedramps on my receiver were apparently miscut originally then welded and recut. Again, this is not acceptable on a new receiver. (Photo #2) In fact, I will accept no welding anywhere on my replacement receiver.
Fitment Issues
Barrel Timing – All the barrels I tried on this receiver hand timed to around 9:30 (75 degrees before TDC). It should be between 11:00 to 11:30 (30-15 degrees before TDC). Please adjust the thread timing on my replacement receiver to hand time in the 11:00 to 11:30 range.
Locking Shoulder Hole Size – The locking shoulder hole size on this receiver measured .284"-.286" (i.e., too small). Based on the flashing and burrs inside the locking shoulder hole, it appears that it was not correctly reamed/honed to final dimensions, which should be .295-.296 in order to accommodate most standard locking shoulders, which measure a nominal .297" shaft size. There’s no way to fit a standard locking shoulder into this receiver without damage and/or requiring significant reaming/honing in order to bring the locking shoulder hole into spec.
Right Side Rail – The right side internal rail was not cut quite far enough forward, which prevents the bolt/carrier assembly from sliding fully into battery. (Photo #3)
Carrier Handle Web Machine Cuts – The machine cuts on both sides of the carry handle web area do not match those on an actual BGS receiver. I have enclosed pictures (Photo #5) that show an actual de-milled Belgian BGS Type 1 receiver with the correct machine cuts as compared to the Entreprise receiver that I received. It appears that a slightly different sized cutter was used to shape the contour of that area. Note that the machine cuts illustrated on the de-milled BGS receiver are fairly standard and can be found on nearly all other metric Type 1 receivers (StG, G1, etc.). I would like my replacement receiver’s contours to match the original Type 1 BGS machine cuts in this area.
Cosmetic Issues
BGS Script – The BGS script on my receiver was very faint & soft, especially when compared to that on an original de-milled BGS receiver which is crisp & deep. Photo #4a compares my Entreprise receiver script with that of the de-milled BGS receiver. Since it is one of the items that I paid a bit extra for, I would like the BGS script on my replacement receiver to be crisp & deep like the original BGS receiver.
Exterior Surface Prep – Overall the receiver’s finish appeared to be overbuffed prior to blueing. The entire exterior surface is devoid of most machine marks and is covered with many small nits & dimples that I assume are from the deburring & buffing stages prior to blueing. I believe that was the cause of the faint BGS script as detailed above. For my replacement receiver, please do not overdo the buffing stage. A few light machine marks are considered normal for a military firearm.
Blueing Quality – Overall the tone and color of the blueing was good. However, I noticed as I was packing the receiver back up to send back for replacement, that the blueing in the area on the right side of the magwell is starting to turn a brownish or plum color. It appears that this is oxidation already starting to set in. I am unsure as to why, because this receiver has always had a coating of quality gun oil on it and has been wrapped in it’s protective bubble wrap while in my possession. Something to be aware of.
Serial Number Spacing & Font – This is a bit nitpicky but when I compared my receiver’s custom serial number to that on my BGS lower, I noticed a slightly smaller font style on my receiver and the spacing of the numbers/letter is a little closer than that of my lower. If possible, on my replacement receiver, please adjust the size of the font and the font spacing to better match that of my lower. It would be great if they looked like they were made at the same place/same time!
HR
Was your receiver actually part of the Entreprise group buy from 2010-2012? How did that work, since they’ve been out of business for a couple years?