Holy Mackeral- Steam Event for ijji. Has expired
Prisoner Foodtray- 500 Coupons. You get coupons from buying G-Coin Capsules.
These are the ONLY way to get them legit.
Dual-TMP has not yet been released to ijji/Aeria AVA. Dual-TMP will most likely be a shop item you can purchase for the pointman as a primary weapon. Search it for yourself in the KAVA (Korean AVA) Wikia.
Hope I helped. Thanks would be nice