nothing but problems with mine...tried tuning the feed lips, worked for a bit and went back to sucking...with only being a 5 round mag, legally, it holds no advantage over the stock mag, even if it was reliable, so I scrapped it the last time I took metal to the yard, couldn't bring myself to even sell it to someone, it was so bad...if there were no mag limits in Canada, I would still use the 10 stock 10 round mag...