A friend of mine has a very good condition Robar RC50 he offered to sell me. I am in the market for a 50 BMG and prioritize accuracy. I am familiar with Robar's coating and appreciate that, but don't care to pay a premium for "rarity" since they are now out of business. I've read very little about these rifles except that they are light and supposedly accurate. Does anyone have first hand knowledge of these rifles? Does anyone make a direct fit chassis for them? Are the mags proprietary and/or can others be modified to fit? He's asking $5,500 for the rifle, thoughts on that or should I consider something else like an M99 for $2,500 less.