First, Block, what game is that?Second, walmart?
http://www.airsplat.com/Items/AR-ZIDA-SPAS.htmThat looks pretty good.
Already have a sight like that from one of my other guns.http://www.amazon.com/gp/product/B000EDJ9I2/ref=s9_simz_gw_s0_p200_i4?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-1&pf_rd_r=0F953FXY484T2MMR3GZM&pf_rd_t=101&pf_rd_p=470938131&pf_rd_i=507846Looks good, but shipping makes it a little too expensive.
Holy forget me want.and only 7.95 shipping, 28 bucks for a pistol that forgetin cool? I'd do it.
The cheapest airsoft MP7 I've seen is the electric Well R4 (80 bucks).